A decellularized small particle tissue derived from blood-laden tissue which has been decellularized at an acid pH in the presence of blood to remove at least a portion of the cellular material therefrom. The product contains conserved beneficial proteins originally present in the blood-laden starting tissue such as fibronectin, laminin, and elastin and comprises particle sizes in the range from 200 microns to 10 Kilo Daltons. A recycling method of filtration is taught to produce various forms of the product.
